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The flicker fusion threshold, also known as critical flicker frequency or flicker fusion rate, is the frequency at which a flickering light appears steady to the average human observer. It is a concept studied in vision science, more specifically in the psychophysics of visual perception. A traditional term for "flicker fusion" is "persistence ...
Photos and videos can be accessed from Flickr without the need to register an account, but an account must be made to upload content to the site. Registering an account also allows users to create a profile page containing photos and videos that the user has uploaded and also grants the ability to add another Flickr user as a contact.
It also became one of the most viewed images on Flickr. [20] Souza's 2009 image of a five-year-old child, Jacob Philadelphia, touching Obama's head has also become iconic. Jacob asked if Obama's hair was similar to his and the image has become symbolic of the African American struggle for civil rights. [21]
The web has been a popular medium for storing and sharing photos ever since the first photograph was published online by Tim Berners-Lee in 1992 (an image of the CERN house band Les Horribles Cernettes). Today, photo sharing sites such as Flickr, Picasa, and PhotoBucket, as well as social websites, are used by millions of people to share their ...
Image sharing. Image sharing, or photo sharing, is the publishing or transfer of digital photos online. Image sharing websites offer services such as uploading, hosting, managing and sharing of photos (publicly or privately). [1] This function is provided through both websites and applications that facilitate the upload and display of images.
2004. by Lawrence Lessig (the first CC licensed book released by a major mainstream publisher, Penguin Books) CC BY-NC 1.0 [ 11] Freesouls. 2008. 2010 (digital ebook) book with essays and photos of key people of the free movement by Joi Ito. CC BY [ 12] The Future of Ideas.
Flicker vertigo. Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light." [ 1] It is a disorientation -, vertigo -, and nausea -inducing effect of a strobe light flashing at 1 Hz to 20 Hz, approximately the frequency of ...
The Wikimedia Commons is a collection of freely licensed images shared by all Wikimedia projects. When you upload an image to Commons, it will automatically be available here under the same filename. This guidance only applies to uploading a work found on Flickr created by someone else (not you).